Question

3. Find the area of a square of side
21 cm​

Answer 1

Answer:

The area of a square is $441cm^{2}$ .

Step-by-step explanation:

Given value is side of a square = 21cm,

To find:- The area of a square.

Here we have to use the formula of area of a square that is as follow,  

Area =$(side)^{2}$

So, the area of a square is as follow,

Side =21cm so substituting the value we get,

$A=21^{2} \\A=21\times 21$

In squaring the number is to multiply by itself,

$A=441cm^{2}$

Answer 2

Answer:

The area of a square is $441cm ^2.$

Step-by-step explanation:

In context to the question asked,  

We have to find the area of a square,

As per data given in the question,  

We have,

Side of square = $21cm$

For calculating area,

The formula to be used for,

The area of a square = ${\text } (side)^2$

$=> (21)^2$

$=> 21\times 21$

$=> 441cm ^2$

Hence, the volume of the cube is $441cm ^2.$